问题描述：
英语翻译
There is one error:The declaration of c in line 6 conflicts with the function parameter c.Some compilers have been seen to flag line 24 as an error,saying it conflicts with the declaration in line 20.This should not be an error,as the scope of y from line 20 runs out at line 22,so there is no conflict.
There is one error:The declaration of c in line 6 conflicts with the function parameter c.Some compilers have been seen to flag line 24 as an error,saying it conflicts with the declaration in line 20.This should not be an error,as the scope of y from line 20 runs out at line 22,so there is no conflict.
问题解答：
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